HTTP Requests in Swift 3

Question

I am fairly new to Swift, and am trying to make an HTTP request. I tried many of the ideas in this Stack Overflow question, but all caused errors when run in a playground; I bel

Answer 1

There are a couple problems with your code:

1. By default, your app cannot connect to insecure (i.e. HTTP) site. It's a feature called App Transport Security. You need to make an exception in your app's Info.plist file to connect to HTTP sites.
2. This: dataTask(urlwith: ! as URL). What are you trying to unwrap with the exclamation mark (!)? What's the variable name?

A lot of class names have changed between Swift 2 and 3 so those answers you've found may not be applicable. Below is an example that connects to httpbin.org to get your IP address:

import PlaygroundSupport
import Foundation

let url = URL(string: "https://httpbin.org/ip")

let task = URLSession.shared.dataTask(with: url!) { data, response, error in
    guard error == nil else {
        print(error!)
        return
    }
    guard let data = data else {
        print("Data is empty")
        return
    }

    let json = try! JSONSerialization.jsonObject(with: data, options: [])
    print(json)
}

task.resume()
PlaygroundPage.current.needsIndefiniteExecution = true